Dear R community, is there an easy way to convert an adjacency list (or a data-frame) to a non-symmetric matrix?
The adjacency list has the following form: person group 1 Sam a 2 Sam b 3 Sam c 4 Greg a 5 Tom b 6 Tom c 7 Tom d 8 Mary b 9 Mary d I need the data in a matrix with persons as rows and groups as columns: a b c d Sam 1 1 1 0 Greg 1 0 0 0 Tom 0 1 1 1 Mary 0 1 0 1 I know that there are several possibilities in some of the network packages to convert adjacency lists to symmetric or sparse matrices, but I couldn't find a way to coerce them into affiliation matrices. kind regards Sebastian -- PD Dr. Sebastian Haunss SfB 597 - Transformations of the State Universität Bremen Linzer Str. 9a 28359 Bremen T: +49-(0)421-218-56654 http://shaunss.ipgovernance.eu/ Recently published: Haunss, Sebastian (2012), “Gewalt und Gewaltlosigkeit in sozialen Bewegungen”, Forschungsjournal Soziale Bewegungen 25(4): 6–16. Leifeld, Philip, and Sebastian Haunss (2012), “Political Discourse Networks and the Conflict over Software Patents in Europe”, European Journal of Political Research 51(3): 382–409. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
